Motor compressor unit



ay 1935- H. CRANE I 3 upTon COMPRYYJSSOR UNIT Original Filed March 17,1927 2 Sheets-Sheet 1 VENTOR I Hqrve .Crane ATTORNEY H. EQCRANE A MOTORcoimwsson UNIT Original Filed larch 17. 192 7 -2 Shets-Sheet 2 Harve BYENTOR Y E. Crane mm A TT'ORNE Y Reissu'ed May 12, 1936 l v UNITED STATESPATENT OFFICE:

MOTOR- coMraEssoa- UNI'I Harvey E. Crane, Fort Wayne, Ind., assign! toThe Hoover Company, a corporation of Ohio Original No. EJ041555, datedMarch 5, 1929, Serial No. 175,975, March 17,1927; Application forreissue February 16 Claims.

The object is to provide an improved gas compressing machineparticularly adapted for use in connection with refrigerating systems;the invention disclosed relates particularly to the arrangement andconstruction of the compressor and the motor for driving the compressor.

A further object of the invention is to provide a fully enclosed motorcompressor unit whereby the usual stumng box about the compressor shaftto present leakage therearound maybe dispensed with, or in other words,to provide an arrangement in which there are no moving parts exposed tothe atmosphere which might need anything in the way of packing toprevent gas leakage.

A still further object of the invention is to provide a gas compressingunit wherein the motor and compressor are mounted upon a central main'motor compressor unit is :clearness of illustration,- the view [fromthe compressor end of theunit.

' numeral l I being the portion of ing the motor stator support castingor frame through which all connections to and from said unit passthereby permitting said unit to be ma e up and tested in full viewbefore sealing. r

A further object of the invention is to provide means in a motorcompressor major parts are rigidly connected so'that there will be notendency forone part of the unit to become dislocated with respect toany of the others 'Zl'he objects of this invention are; accomplished byemploying a frame member which forms the support for both the motor andcompressor of the 'unit and the other related parts of the motorcompressor mechanism and to which frame are secured closures or domes bymeans of which the completely enclosed in an air-tight manner in orderthat gas undercompression may not leak from the system nor air leakthereinto. The gas ports for the compressor and :all electrical leadsare preferably arranged within this frame so that there will be nodanger of disruption thereof due to relative movement between the domesand said frame member.

In the drawings: I I Figure 1 shows a complete motor compressor .unitsuitable for use in connectionwlth refrigeratingmachines, the showingbeing in section sub:

stantially on lines l l of Fig. 2;

Fig. 2 Lean end view of Fig. 1 with the outer dome moved and withcertainparts left out for being taken the-drawings the main or framecastingis indicated by numeral I and comprises two major parts H and I2,the first, or the y the casting form'- while the portion l2 unit whereinall part indicated by 18, 1931, Serial No. 516,704

indicates the compressor support. These two parts of the main castingshould be firmly secured together in any appropriate manner, and asshown, preferably by spot-weldingthrough the flange l4. However thesetwo parts may be made of a single piece, or they may be bolted togetherin the customary fashion.

Casting I2 is approximately U-shapedand the outer overhanging portionouter bearing support for the motor shaft.

It is to be understood that the main frame as above described may bemade as a single piece if its design is not such as to make it diflicultto cast as a single member, and that it is not necessary t at the mainframe major portions such as is speciflcally'illustrated. The main framemay also comprise a major portion and several minor portions, the objectof this invention being to provide a construction wherein the entiremachine is frame and not to provide frame support.

Mounted in casting l2 and therefore supported in casting ll becausebetween the castings which carries the motor-rotor ll mounted on one endthereof, andlalso on the other side of the main bearing there is mountedon said shaft, an eccentric l8 for operating the pistons IQ of thecompressor. 7 yond the outer bearing formed in the outer portion 15 ofthe U-shaped frame member, and here is mounted a centrifugal compressorunloading device 2|,

a specific. form of main Cylinders 20 mounted in bores of the frame 35as it is supported on'main frame assembly l0 and 40 not on some partunconnected "therewith so that there might be relative movement betweenthe main frame and the compressor mounting.

i As a part of frame member 12 thereisl housing from which pipes lead{-8545 indicated at 22 and 23, these pipesbeing the high. Y

vided .a valve pressure pipes which lead from the valve casing 24 andconnect to the discharging into passages therein which open therethroughat 21 and it for high pressure gas. for-instance, into condenser'ofa'refrigeratingsystem. Q 4 Q A mufller for the compressed gasisincorporated inconnection with the valve lig nd is' indicated generallyby numeral 20. The pipe 30 55 I thereof serves as an Ill be limited totwo supported from a main' of that connection existing there is a motorshaft I6 Shaft l6 extends through and bemainframe H at 25 andmedischarge of leads from the valve casing 24 to a pressure equalizingvalve 40, so that when the machine stops the pressures throughout thesystem may equalize.

Suction gas is permitted to enter the unit through conduit 4| which maybe connected, through pipe 42, to the expansion coils of a refrigeratingcylinders 2liare shown at 43, which of course take in such gaswhich'enters the chamber formed by the domes 32.

The unit as thus far described will comprise'a complete motor compressorunit which maybe operated as such, the entire unit being mounted on acentral frame with the motor projectingfrom one side thereof and thecompressor from the other side thereof. Two domes 32 are provided forinclosing this apparatus, one to be placedover the motor side of theunit and the other over the compressor side of the unit. These domes maybe secured to the main frame I I" through a series of bolts, one ofwhich is shown at 33 as passing through the holes 34.- However, thejoints between these domes and the main frame I I should form a. gastight seal.

Fins 35 are provided upon the enclosing domes 32 in order that the heatgenerated by the motorcompressor unit may be more readily dissipated.Main frame casting l l is provided at its bottom part with integral ears36 to which may be secured angle members such as 31 whereby theentireunit may be mounted upon an appropriate base.

It will be seen that there has been provided a motor compressor unitwhich is very rugged in construction and one wherein there is the mini.-mum liability for the parts to become disarranged. It is furtherapparent that during operation of this unit the domes 32 form a chamberfor receiving the suction gas and that the motor and compressor unitsoperate within this gas medium, for instance the suction gas enters thechamber formed by that dome 32 which incloses the compressor unitthrough conduit .4l, and the compressor unit takes the gas therefromthrough suction ports 43. That dome 32 which incloses the motor preventsthe escape of any 88.5 which may leak through the main bearing It.

It is obvious that an arrangement of piping might be provided to connectthe conduit 4| with the suctionports 43, then the domes 32 would servemerely to prevent the escapev of any gas which might leak from thecompressor; or as another modification the pipes .22 and 23 might be Ieliminated, under which condition the exhaust side of thecompressorwould -open ,into the chambers formed by that dome 32 which incloses theinstance'to the condenser of a refrigerating machine, through pipes 21and 28; the compressor However, in either modification there are nomoving parts exposed to the atmosphere which might need packing toprevent leakage.

the unit may be run in this condition to determineits fitness for themarket: or in case the unitmay need repairing itis merely necessary toremove either of the domes :32, as the case may require and suitablerepairs operating tests mayreadily bemade'. By having the entire machinebuilt. upon the central casting l0 and placing thedome 32 over system.The suction ports for the compressor unit, and finally be carried oil,for l the motor and compressor, it is possible by sealing these domes toprovide a. construction wherein there is practically no liability ofleakage, and further, it is possible to dispense with the usual shaftpacking employed in machines of this general character.

I claim:

1. In a motor 'compressorunit', the combination of a main framecomprising the support for the unit, a motor and a compressor mounted onthe main frame, driving connection between the motor and the-compressorand closuremembers enclosing the motor and compressor and sealed tothemainsframe said motor and said compressor being supported entirely bysaid frame.

2. In a motor compressor unit, the combination of a main supportingframe, a motor mounted-on one side of said frame, a compressor mountedon the other side of said frame, and a closure member mounted on eachside of said frame and forming two separate chambers in which the motorand compressor are located respectively said motor and said compressorbeing supported en-.

tirely by said frame.

3. A motor compressor unit comprising in combination a central mainframe, closure members secured to-- each side of said frame and formingtwo distinctchambers, a motor located in one of said chambers and acompressor in the other, said motor and said compressor being supportedentirely by said frame.

4. In a gas compressing machine the combination of a main frame membercomprising a support for both a prime mover and a compressor and closuremembers in sealed relation with said frame. member, said frame extendingbeyond said closure members forming a base said motor and saidcompressor being supported entirely by said frame.

5. In a gas compressing machine, the combination of a main frame member,a motor mount- I ed on one side of said frame member and a compressor onthe other-,closure members in sealed relation with said frame memberforming individual chambers housing said motor and said compressor-andconduitspassing through saidframe' member and connecting said-chamberhousing the compressor with the exterior, said motor. and saidcompressor being supported entirely by said frame member.

6. In a motor compressor unit the combination of a main supportingframe,a motor, carried by said frame, a compressor carriedby said frameand operably connected to said .motor gas conduitsformed insaid frametogconvey. gas to and from said compressor andgenclosingpmembers sealingsaid motor and said compressorin indi- I vidual chambers on oppositesides ofsaid frame,

. xsaid motor and said-compressor being supported then operates in agasmedium of high pressure.

entirely by saidframe.

"I. In a motor compressor unitthe combination and fsupportedthereby saidmotor and said compressor being supported-entirely by saidframe.

8;. :A motor compressor :unit comprising in combination a central mainframejclosure'members v secured to each side'.of-.:said-.'frame,andforming' two distinct chambers therewith; a motor located inone ofsaid ohambers'and a compressor iii'the other, and a driving connectionbetween the m0- ,tor and compressor, said motor and said compressorbeing supported entirely by said frame.

I closing members connected to said main frame' the atmosphere saidmotor and tion of a main frame 9. In a motor compressor unit thecombination of a main frame, a motor carried by said frame, a compressorcarried by said frame and operably connected to said motor, a .gasconduit formed in said frame connected to said compressor and compressorfrom said compressor being supported entirely by said frame.

10. In a motor compressor unit the combinacomprising a support for theunit, a motor and a compressor mounted on said main frame, a drivingconnection between for sealing the motor and the the motor and thecompressor and closure mem main frame, said motor and hers sealed to thesaid compressor being supported by said main frame entirelyindependently of said closure members.

' 11. Inc, motor compressor unit the combination of a main supportingframe, a motor mounted on one side of said frame, a compressor mountedon the otherside of said frame, and'closure members mounted on each sideof said frame and forming with the frame two separate closed chambers inwhich the motor and-compressor are located respectively, said motor andsaid coinpressor being supported on said main frame independently ofsaid closure members and said frame being supported independently ofsaid 010-.- sure members. 4

12. In a gas compressing machine the combination of a main frame membercomprising the sole support for both a prime mover and a compressor, andclosure members in sealed relation with said main frame for sealing theprime mover and compressor from the atmosphere and said frame extendingbeyond said closure members and forming a base.

13. In a gas compressing machine the combination of a main framemember,.a motor and a compressor mounted on said framemember, saidsealing the motor frame member sor.

- said motor and said compressor motor and said compressor beingsupported entirely by said frame member, closure members in sealedrelation with said frame member for and compressor from the atmosphereand conduits passing through said and connected to said compres- 14. Ina motor compressor unit the combination'of a main supporting frame, amotor carfied by said frame, a compressor carried by said frame andoperably connected a gas conduit formed in said frame and connected tosaid compressor and closure members in sealed relation with said framefor sealing from the atmosphere, said motor and said compressor beingsupported independently of said closure members.

15. A motor operated pump comprising a casing having a centralsupporting portion and means forming a compartment on each side thereof,a unit pump located in one of said compartments, a motor located inanother compartment and driving means connecting said motor and pump,said pump and said motor being supported entirely by said centralsupporting portion;

16. In a motor compressor unit, a main frame comprising a supportingsection and an extension at one side thereof, a motor mounted on saidextension and having an armature shaft journalled in and extendingthrough the supporting section, a compressor actuated "by said motorshaft mounted on said main frame at the side opposite said motor, aclosure member cooperating with said main frame to provide a fluid-tightcompartment housing said motor, and a second closure member secured tosaid main frame to form a second fluid-tight compartment enclosing saidcompressor, said motor and said comp'ressor being supported entirely bysaid frame.

- HARVEY E. CRANE.

to said motor,

